Drying-cylinder.



G. D. KILBERRY.

DRYING CYLINDER.

APPLICATION FILED JULY 12, 1913.

1 1 08,077. Patented Aug. 18, 1914.

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Mi hmm QUi J/QW J swmt UNITED STATES PATENT OFFICE.

GEORGE D. KILBERRY, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO RICE, BARTON & FALES MACHINE & IRON 00., OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

DRYING-CYLINDER.

To all whom it may concern Be it known that I, GEORGE D. KILBERRY, a citizen of the United States, residing at Worcester, in the county of lVorcester and State of Massachusetts, have invented a new and useful Drying-Cylinder, of which the following is a specification.

This invention relates to drying cylinders, such as are used in paper making machinery, and has particular reference to an improved means for collecting and removing water from the interior surface of such cylinders. These cylinders'are of considerable size and in the operation of the machine the damp sheets of paper are caused to travel over the exterior surface of the cylinder, this surface being heated by the application of low pres- Sure steam to the interior thereof. The contact of the cylinder with the moist sheet of paper traveling over its exterior tends constantly to cool the cylinder and to cause condensation of the steam therein. This water of condensation if allowed to remain in the cylinder seriously interferes with the efiiciency of the machine, and .mechanism has heretofore been devised for collecting and removing this condensation.

It is the object of this invention to improve mechanism of this character, and particularly to provide a device in which backfiow of the collected water will be efl'ectively prevented.

With this object in view, my invention consists in the combinations and details of construction hereinafter set forth, and more specifically pointed out in the appended claims.

Referring to the drawings, in which is shown a preferred form of my invention, Figure 1 is a sectional longitudinal view of my device partially broken awa and Fig. 2 is a partial sectional view on t e line 22 in Fig. 1.

A drying cylinder constructed in accordance with my invention is formed with two end disks or heads 10 and 11 and a cylinder or drum 12 connecting said disks. The head 1 is provided with a bearing 13 herein shown as a hollow shaft Within which is mounted an air valve 14. The disk 10 is likewise provided with a hollow bearing shaft 15, to the end of which is connected, by any suitable rotary stuffing box, a nonrotatable member 16 with which is connected an inlet pipe 17 for the low pressure Specification of Letters Patent.

Application filed July 12, 1913.

Patented Aug. 18, 1914. Serial No. 778,756.

steam. Steam for heating the cylinder passes through the pipe 17, the member 16, and the hollow shaft 15 to the interior of the drum.

The elements thus far described form no part of my invention, and may be of well known or common form.

Vithin the drying cylinder I provide a collecting device consisting of a scoop or flange member 18 and a collecting chamber 19. The flange portion may be provided with a plurality of low ridges or ribs 20 by which the scoop is divided into a plurality of sections and each section is provided with a downwardly opening outlet or nozzle 21 which is shown as extending a substantial distance into the collecting member in order to prevent back flow of the collected water.

In the preferred form of my device the scoop or flange 18, the collecting chamber 19, and the nozzles 21 are formed as integral parts of a single casting secured by screws 19 to the drum 12.

The collectin chamber 19 is enlarged toward the right and end as at 22, and at the extreme lower point of this enlargement a pipe 23 provides a radial connection through which the collected water may be transferred to a trap chamber 2-1. This chamber is also mounted to rotate with the drying cylinder and is secured to the end disk 10 by a plurality of securing bolts or screws 25 (see Fig. 2). The pipe 23 extends a substantial distance into the trap chamber 24 as shown in Fig. 1, this construction also serving to prevent back flow of the collected water. The trap chamber 24 is extended to the axis of the cylinder and is provided with an axial outlet or exit 26 and a sleeve portion 27 concentric with said exit. .Vithin said sleeve portion is secured a horizontal pipe 28 extending through the hollow bearing shaft 15 and having a running fit in the non-rotatable member 16. The member 16 is'provided with a chamber 29 communicating with the pipe 28, and said chamber is also provided with a second and downwardly extending pipe 30.

In the operation of this device the cylinder is rotated at a comparatively low rate of speed and the Water of condensation collecting upon the drum of the cylinder will follow the walls thereof until it reaches the lowest point of the cylinder. The scoop 18 at each revolution of the cylinder takes up the water collected at the bottom of the cylinder, and as the scoop gradually rises the Water flows through the nozzles 21 into the collecting chamber 19. As the collecting chamber approaches the upper limit of its travel the collected Water flows toward the enlarged end 22 of the chamber and passes through the pipe'23 to the trapchamber 24:. Continuing its fioW in the same direction, the collected Water passes through the axial exit 26 into the pipe 28, thence to the chamber 29 and to the downwardly-extending pipe 30 Which may be connected with any usual header pipe and exhaust valve as desired.

For the prevention of back flow of the collected Water it Will'be seen that I have provided a plurality of traps; the nozzles 21 extending into the chamber 19 constituting the first of the series; the pipes 23 extending a substantial distance into the chamber 24: constituting the second trap in the series; While the axial exit 26 is made somewhat smaller than the interior diameter of the pipe 28 and provides a flange 31 which prevents the back flow of small quantities of Water from the pipe 28 into the trap 24:.

moaow member comprising a flange portion, a Water collecting chamber, and a plurality of nozzles extending from said flange portion a substantial distance into said collecting chamber and forming traps to prevent back flow of the collected water, said collecting member being eccentrically mounted upon the inner circumferential surface of the cylinder and having a radial connection from one end thereof to said axial drainage outlet.

2. A drying cylinder having in combination a rotating drum, a scoop, a collecting chamber, a trap chamber connected to said collecting chamber, an axial drainage pipe connected to said trap chamber, and means to prevent back flow of the collected Water from each member to the member immediately preceding it in the pat o flow of the water.

In testimony wlwreof I have hereunto set my hand, in the presence of twosnbscribing witnesses.

GEORGE KILBERB Witnesses GEORGESUMJNER Samoa, JO I omp s i- 

